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This collection provides a complete package for manipulating and
converting color and black and whites images, including 24bit RGB, 8bit
mapped color, 8bit grayscale, and 1bit bitmapped images.
clr2gray Convert color to grayscale
fbcat Copy image (used for format conversion)
fbclean Flip isolated pixels (clean image)
fbconv Arbitrary convolutions
fbedge Compute derivative image (edge detection)
fbext Extract region, resize, change aspect ratio
fbgamma Gamma correct grayscale or color image for display
fbhalf Halftone grayscale image (Blue noise, Floyd-Steinberg, etc)
fbham Convert FBM 24bit RGB to Amiga HAM mode
fbhist Compute histogram
fbinfo Dump image header
fbm2pod Convert grayscale image to Diablo graphics (!)
fbm2tga Convert image to Targa format
fbm2tiff Convert FBM files to 1, 2, 4, 8, or 24 bit TIFF
fbmask Set region to gray value
fbmedian Median filter 3x3 regios
fbnorm Normalize image intensity / increase contrast
fbpalet Replace an imager's colormap with another, remove duplicates
fbps Convert to PostScript
fbquant Color quantization (24 bit to 8..256 colors) Mod. Heckbert
fbrot Rotate 90, 180, or 270 degrees
fbthin Thin 1bit images
fbsample Sample a 1bit file to produce an 8bit file
fbsharp Sharpen (edge enhancement) by digital Laplacian
gray2clr Add a "gray" colormap to a grayscale image
idiff (and udiff) convert raw byte stream into byte difference
pbm2ps Convert PBM file to PostScript
pbmtitle Add a title to a PBM file
raw2fbm Convert raw file to FBM format (eg: Amiga Digiview files)
tga2fbm Convert Targa file to FBM format
tiff2fbm Convert tiff file to FBM format
uunet2fbm Convert UseNet Facesaver file to FBM format
File Formats
FBM (-F) FBM file with 256 byte header (with title & credits)
Sun (-S) Sun rasterfile with 32 byte header
Tiff (-T) Aldus TIFF
PBM (-P) Poskanzer format for 1bit files
GIF (-G) CompuServe GIF format
JPG (-J) JPEG JFIF format (cf The Independent JPEG Group)
RLE (-R) Utah RLE format
IFF (-I) Amiga IFF files (except HAM mode files)
PCX (-Z) PC PaintBrush format for IBM
Face (-B) Bennet Yee's 1bit files, used at CMU
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From the README file
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